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<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
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<body>
  <script>
    function foo() {
      console.log("foo函数", this);
    }
    const obj = {
      bar: foo
    }
    obj.bar() //隐式绑定：指向obj
  </script>
</body>

</html>